US4642871A - Manufacturing method of a clutch cover assembly - Google Patents

Manufacturing method of a clutch cover assembly Download PDF

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Publication number
US4642871A
US4642871A US06/738,790 US73879085A US4642871A US 4642871 A US4642871 A US 4642871A US 73879085 A US73879085 A US 73879085A US 4642871 A US4642871 A US 4642871A
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US
United States
Prior art keywords
clutch cover
projection
projections
bending
bodies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/738,790
Other languages
English (en)
Inventor
Mamoru Ookubo
Takayuki Iwasaki
Kenji Mieda
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Exedy Corp
Original Assignee
Exedy Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exedy Corp filed Critical Exedy Corp
Assigned to KABUSHIKI KAISHA DAIKIN SEISAKUSHO reassignment KABUSHIKI KAISHA DAIKIN SEISAKUSHO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: IWASAKI, TAKAYUKI, MIEDA, KENJI, OOKUBO, MAMORU
Application granted granted Critical
Publication of US4642871A publication Critical patent/US4642871A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/583—Diaphragm-springs, e.g. Belleville
    • F16D13/585—Arrangements or details relating to the mounting or support of the diaphragm on the clutch on the clutch cover or the pressure plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49922—Overedge assembling of seated part by bending over projecting prongs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53717—Annular work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53996—Means to assemble or disassemble by deforming

Definitions

  • the present invention relates to a manufacturing method of a clutch cover assembly used in a friction clutch of a diaphragm spring type for automobiles and others.
  • a diaphragm spring for forcing a pressure plate is supported by projections or tabs of a clutch over through wire rings which form fulcrums of the diaphragm spring.
  • a plurality of the projections are integrally formed at the inner periphery of the clutch cover and are bent to support the inner peripheries of a pair of the wire rings.
  • the free ends of the projections are bent to support the adjacent wire ring from the side opposite to the diaphragm spring. Therefore, in the conventional manufacturing work of the clutch cover assembly, there is such a problem that a number of the working processes is large. Further, in some cases, the wire rings can not be held accurately owing to the bending error in sizes and other reasons, and thus, intended smooth releasing operation can not be obtained.
  • a manufacturing method of a clutch cover assembly comprises a first process in which an annular clutch cover body of a clutch cover is formed, a plurality of projections extending substantially radially inwardly from the inner periphery of the clutch cover body are formed and ends of said projections are bent so that the projections may extend in an axially inside direction of the clutch cover and toward a center of the clutch cover; a second process in which projection bodies between the clutch cover body and said projection ends are bent so that the projection bodies may extend in the axially inside direction of the clutch cover and toward the center of the clutch cover; and a third process in which a diaphragm spring and a pair of wire rings disposed at both sides of said spring for forming fulcrums for the spring are assembled to the projections, and then, the projection bodies are bent in a radially outward direction of the clutch cover and the projections ends are bent toward the inner peripheral portion of the clutch cover.
  • FIGS. 1(A)-1(D) are schematic fragmentary sectional views of a clutch cover assembly respectively in different processes according to a method of the present invention
  • FIG. 2 is a schematic fragmentary sectional view of an assembled clutch cover assembly
  • FIG. 3 is a schematic fragmentary sectional view of a bending machine
  • FIGS. 4(a)-4(c) are schematic fragmentary views of a clutch cover assembly respectively in different processes according to a conventional method.
  • a pressure plate 2 is covered from its outer peripheral side and rear side by a clutch cover 1, of which radially outer portion is fixed to a flywheel (not shown) of an engine.
  • the pressure plate 2 is provided at the rear surface with protrusions 3, which outer peripheral portions of an annular diaphragm spring 4 contacts.
  • a pair of wire rings 5 and 6 contact respective surfaces of a radially middle portion of the spring 4.
  • the wire rings 5 and 6 form fulcrums for the spring 4, and are supported from radially inner sides and sides opposite to the spring 4 by projections 7 of the clutch cover 2.
  • a release bearing 8 is faced to the side opposite to the pressure plate 2 of the inner peripheral portion of the spring 4.
  • the release bearing 8 is disposed around an output shaft (not shown) slidably only in an axial direction and is connected to a clutch pedal (not shown) through an appropriate link mechanism.
  • the clutch pedal When the clutch pedal is stepped on, the release bearing pushes the inner peripheral portion of the diaphragm spring 4, so that the pressing force applied by the spring 4 to the pressure plate 2 is released, and thus, the clutch is disengaged.
  • the clutch pedal is released, the spring 4 elastically forces the pressure plate 2, so that the plate 2 presses a friction facing (not shown) of a clutch disc against the flywheel, and thus, the clutch is engaged.
  • the projections 7 are circumferentially spaced and integrally provided at the inner periphery of an annular body 9 of a clutch cover 1, and extend toward the pressure plate 2 through openings 10 provided in the diaphragm spring 4. Free ends 12 of the projections 7 are bent nearly radially outwardly to support the wire ring 6 from the side opposite to the spring 4.
  • the above clutch cover assembly is manufactured in accordance with processes in FIGS. 1(A)-1(D).
  • a blank of the cover body 9 and the projections 7 are formed. In this process, the whole of the body 9 and projections 7 are formed into a flat shape.
  • a bent portion 15 is formed in the cover body 9. Simultaneously, the ends 12 of the projections 7 are bent so that the ends 12 are inclined radially inwardly and toward the inside of the clutch cover 1, i.e., toward the pressure plate 2 in FIG. 2, and an obtuse angle d is formed between the ends 12 and the body 13.
  • the projection bodies 13 are bent with respect to the cover body 9, so that the projection bodies 13 are inclined radially inwardly and toward the inside of the cover 1 with respect to the cover body 9 and an obtuse angle D is formed between each projection body 13 and the cover body 9.
  • the projection ends 12 are projected radially outwardly away from the cover body 9 from the projection body 13.
  • the projections 7 are inserted into the openings 10 of the diaphragm spring 4 in a condition in which the wire rings 5 and 6 are disposed at the respective sides thereof. Then, the projection bodies 13 are bent radially outwardly to be substantially perpendicular with respect to the cover body 9. Simultaneously, the projection ends 12 are bent toward the spring 4 with respect to the projection bodies 13, so that an angle between each end 12 and the body 13 becomes a value substantially smaller than 90 degrees. Whereby, the wire rings 5 and 6 are held from the inner peripheral sides and the sides opposite to the diaphragm spring 4 by the projections 7 without a play.
  • This bending process is performed by a device shown in FIG. 3.
  • the clutch cover 1 with which the diaphragm spring 4 and the wire rings 5 and 6 are assembled are supported by a lower die (not shown) with the projections 12 upward.
  • an upper die 20 is lowered.
  • the die 20 ia provided with portions 21 for radially outwardly bending the projections 7 and a portion 22 for downwardly bending them.
  • the bending portions 21 guide the ends 12 and the bodies 13 which are in the initial inclined position shown by solid line and bend them.
  • the portion 22 will downwardly bend the ends 12, which are bent over the wire ring 6.
  • the bodies 13 since the bodies 13 were bent radially outwardly by the portions 21, the bodies 13 securely engage with the inner peripheries of the wire rings 5 and 6 without a play. Further, since the ends 12 were bent downwardly by the portion 22, the ends 12 axially securely hold the wire rings 5 and 6 and the diaphragm spring 4 without a play. Therefore, the spring 4 and the wire rings 5 and 6 are accurately positioned, and thus, in the completed structure, the spring 4 operates smoothly, resulting in an improved operation characteristic.
  • the projection ends 12 are inclined relatively to the projection bodies 13 to form the obtuse angle in the drawing process (a part of first process), then, the projection bodies 13 are inclined relatively to the cover body 9 to form the obtuse angle in the re-strike process (second process), and then, the projection ends 12 and the projection bodies 13 are bent to the intended positions in the bending process (third process). Therefore, the number of the working processes can be reduced and the assembling accuracy can be improved.
  • the advantages of the present invention will be detailed further in comparison with an conventional method shown in FIG. 4.
  • FIG. 4 which is described in a Japanese laid-open publication No. 58-39820, is as follows. Initially, as shown in FIG. 4(a), projection ends 12 are bent perpendicularly with respect to the projection bodies 13. Then, as shown in FIG. 4(b), the projection bodies 13 are bent relatively to the cover body 9 to form an obtuse angle. Then, as shown in FIG. 4(c), the spring 4 and the wire rings 5 and 6 are assembled, and the projection bodies 13 are perpendicularly bent with respect to the cover body 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Operated Clutches (AREA)
US06/738,790 1984-05-31 1985-05-29 Manufacturing method of a clutch cover assembly Expired - Fee Related US4642871A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59112683A JPS60256625A (ja) 1984-05-31 1984-05-31 クラツチカバ−組立体の製造方法
JP59-112683 1984-05-31

Publications (1)

Publication Number Publication Date
US4642871A true US4642871A (en) 1987-02-17

Family

ID=14592859

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/738,790 Expired - Fee Related US4642871A (en) 1984-05-31 1985-05-29 Manufacturing method of a clutch cover assembly

Country Status (6)

Country Link
US (1) US4642871A (ko)
JP (1) JPS60256625A (ko)
KR (1) KR890003405B1 (ko)
DE (1) DE3519239A1 (ko)
FR (1) FR2565136B1 (ko)
GB (1) GB2160128B (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791801A (en) * 1987-08-03 1988-12-20 Westinghouse Electric Corp. Reversible fuel assembly grid tab repair tool
GB2345944A (en) * 1995-12-05 2000-07-26 Luk Lamellen & Kupplungsbau Clutch with diaphragm spring swivel mounting tabs formed integral with housing
US6257043B1 (en) * 1999-12-30 2001-07-10 Unova Ip Corp. Modified flat hem apparatus and method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189558A (en) * 1986-04-26 1987-10-28 Automotive Products Plc Friction clutch
GB2237076B (en) * 1989-10-05 1993-12-15 Automotive Products Plc Clutch cover assembly
CN101823195B (zh) * 2010-02-24 2012-07-04 钱江弹簧（北京）有限公司 弹簧组合盘的制造工艺及其设备
JP2017057923A (ja) * 2015-09-16 2017-03-23 アイシン精機株式会社 クラッチカバー組立体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939951A (en) * 1974-12-23 1976-02-24 Dana Corporation Diaphragm clutch spring having radial and rotational restraints
US4109368A (en) * 1976-07-14 1978-08-29 Automotive Products Limited Method of assembling a sub-assembly of a diaphragm spring friction clutch
JPS5839820A (ja) * 1981-09-01 1983-03-08 Aisin Seiki Co Ltd クラツチ装置のカバ−組部材
US4555055A (en) * 1982-08-06 1985-11-26 Connolly James D Method of making centrifuge screen baskets

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1443367A (en) * 1973-07-25 1976-07-21 Automotive Prod Co Ltd Friction clutches
GB1514297A (en) * 1975-10-22 1978-06-14 Automotive Prod Co Ltd Method of and apparatus for assembling a sub-assembly of a diaphragm spring clutch
FR2328883A1 (fr) * 1975-10-22 1977-05-20 Automotive Prod Co Ltd Procede et dispositif pour assembler le couvercle et le ressort a diaphrame d'un embrayage a friction
GB1482768A (en) * 1975-12-18 1977-08-17 Automotive Prod Co Ltd Friction clutches
JPS5817227A (ja) * 1981-07-24 1983-02-01 Daikin Mfg Co Ltd クラツチカバ−組立体
JPS5857519A (ja) * 1981-10-01 1983-04-05 Aisin Seiki Co Ltd クラツチ装置のカバ−組部材

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939951A (en) * 1974-12-23 1976-02-24 Dana Corporation Diaphragm clutch spring having radial and rotational restraints
US4109368A (en) * 1976-07-14 1978-08-29 Automotive Products Limited Method of assembling a sub-assembly of a diaphragm spring friction clutch
JPS5839820A (ja) * 1981-09-01 1983-03-08 Aisin Seiki Co Ltd クラツチ装置のカバ−組部材
US4555055A (en) * 1982-08-06 1985-11-26 Connolly James D Method of making centrifuge screen baskets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791801A (en) * 1987-08-03 1988-12-20 Westinghouse Electric Corp. Reversible fuel assembly grid tab repair tool
GB2345944A (en) * 1995-12-05 2000-07-26 Luk Lamellen & Kupplungsbau Clutch with diaphragm spring swivel mounting tabs formed integral with housing
GB2345944B (en) * 1995-12-05 2000-09-06 Luk Lamellen & Kupplungsbau Friction clutch
US6257043B1 (en) * 1999-12-30 2001-07-10 Unova Ip Corp. Modified flat hem apparatus and method

Also Published As

Publication number Publication date
DE3519239C2 (ko) 1987-06-25
FR2565136B1 (fr) 1988-11-04
GB8513518D0 (en) 1985-07-03
KR850007951A (ko) 1985-12-11
JPH0446659B2 (ko) 1992-07-30
JPS60256625A (ja) 1985-12-18
GB2160128A (en) 1985-12-18
GB2160128B (en) 1987-11-11
KR890003405B1 (ko) 1989-09-20
DE3519239A1 (de) 1985-12-05
FR2565136A1 (fr) 1985-12-06

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AS Assignment

Owner name: KABUSHIKI KAISHA DAIKIN SEISAKUSHO, 1-1, 1-CHOME,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:OOKUBO, MAMORU;IWASAKI, TAKAYUKI;MIEDA, KENJI;REEL/FRAME:004411/0715

Effective date: 19850515

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Effective date: 19950222

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362